package com.qf.web;

import com.alibaba.fastjson.JSON;
import com.qf.service.StudentService;
import com.qf.service.impl.StudentServiceImpl;
import com.qf.vo.PieVo;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

/**
 * @date 2022/4/2
 * @desc
 */
@WebServlet("/echarts2")
public class Echarts2Servlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req,resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        StudentService studentService = new StudentServiceImpl();
        List<PieVo> list = studentService.showSexPie();

        // 把响应结果  转成 JSON格式  发送给浏览器
        String s = JSON.toJSONString(list);

        resp.getWriter().println(s);
    }
}
